This oil filler cap is designed to fit Cummins Diesel engines M11 QSM and ISM. It has an OE/OEM part number of 4071224X and is manufactured in China. This cap is a vital component for maintaining your engine's performance and should be replaced if damaged or missing. With this filler cap, you can ensure that your engine is protected from dirt, dust, and other foreign materials that can cause damage to your engine. It is a reliable and durable replacement part that meets or exceeds OEM specifications. Buy with confidence and keep your engine running smoothly with this 4071224 filler cap.